@Michael Vogel I'm not seeing your comment on my instance but I followed your request for one example and copied a little more from the friend.log. But i didn't find anything from the exact same time:

[14/Jul/2021:14:24:04 +0200] "GET /ping?format=json&uid=2&_=1626264997110 HTTP/1.0" 200 60620 "https://fd.winklerfamilie.eu/network" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/**.**.**.** Safari/537.36"
[14/Jul/2021:14:24:25 +0200] "GET /profile/efelonzrl=%20%D0%A1%D0%BE%D1%80%D0%BE%D0%BA%D0%B8%D0%BD%20%D0%90%D0%BB%D0%B5%D0%BA%D1%81%D0%B5%D0%B9/'s%20profile%20@%20http:/social.feder8.ru/profile/xrev%252?page=76 HTTP/1.0" 404 12825 "-" "Mozilla/5.0 (compatible; MJ12bot/v1.4.8;http://mj12bot.com/)"

2021-07-14T12:24:02Z worker [INFO]: Connection usage (system values) {"used":2,"max":300} - {"file":"Worker.php","line":584,"function":"maxConnectionsReached","uid":"dae44c","process_id":7686}
2021-07-14T12:24:02Z worker [INFO]: No tasks found [] - {"file":"Worker.php","line":875,"function":"nextProcess","uid":"dae44c","process_id":7686}
2021-07-14T12:24:02Z worker [INFO]: Couldn't select a workerqueue entry, quitting process {"pid":7686} - {"file":"Worker.php","line":167,"function":"processQueue","uid":"dae44c","process_id":7686}
2021-07-14T12:24:02Z worker [NOTICE]: Load: 0.43/50 - processes: 0/2/0 (0:2) - maximum: 4/4 [] - {"file":"Worker.php","line":786,"function":"tooMuchWorkers","uid":"ddaf4e","process_id":7684}
2021-07-14T12:24:02Z worker [INFO]: Connection usage (system values) {"used":1,"max":300} - {"file":"Worker.php","line":584,"function":"maxConnectionsReached","uid":"ddaf4e","process_id":7684}
2021-07-14T12:24:02Z worker [INFO]: No tasks found [] - {"file":"Worker.php","line":875,"function":"nextProcess","uid":"ddaf4e","process_id":7684}
2021-07-14T12:24:02Z worker [INFO]: Couldn't select a workerqueue entry, quitting process {"pid":7684} - {"file":"Worker.php","line":167,"function":"processQueue","uid":"ddaf4e","process_id":7684}
2021-07-14T12:24:04Z index [INFO]: No HTTP_SIGNATURE header [] - {"file":"HTTPSignature.php","line":476,"function":"getSigner","uid":"351437","process_id":4145}

@Michael Vogel or maybe this is more of what you had in mind? (I'm sorry. I'm not at home right now which makes searching and formating not so easy):

[14/Jul/2021:14:34:35 +0200] "GET /static/identity-v1.jsonld HTTP/1.0" 404 12748 "-" "-"
[14/Jul/2021:14:34:35 +0200] "GET /static/activitystreams.jsonld HTTP/1.0" 404 12752 "-" "-"

2021-07-14T12:34:35Z index [INFO]: Provided GUID found. {"guid":"da014be1-1060-eed9-8688-f31661226866","uri-id":174669} - {"file":"Objects.php","line":56,"function":"rawContent","uid":"f9e7c4","process_id":4145}
2021-07-14T12:34:35Z index [INFO]: Fetching activity {"item":327476} - {"file":"Transmitter.php","line":1043,"function":"createActivityFromItem","uid":"f9e7c4","process_id":4145}
2021-07-14T12:34:35Z index [INFO]: Fetched activity {"item":327476,"uid":2} - {"file":"Transmitter.php","line":1159,"function":"createActivityFromItem","uid":"f9e7c4","process_id":4145}
2021-07-14T12:34:35Z index [NOTICE]: no data for session {"session_id":"0ipj5ne42lga8nkjmvc82k5t5t","uri":"\/static\/identity-v1.jsonld"} - {"file":"Database.php","line":72,"function":"read","uid":"5db843","process_id":20467}
2021-07-14T12:34:35Z index [INFO]: No HTTP_SIGNATURE header [] - {"file":"HTTPSignature.php","line":476,"function":"getSigner","uid":"5db843","process_id":20467}
2021-07-14T12:34:35Z index [WARNING]: JsonLD normalize error [] - {"file":"JsonLD.php","line":110,"function":"normalize","uid":"f9e7c4","process_id":4145}
2021-07-14T12:34:35Z index [NOTICE]: JsonLD normalize error {"messages":["Could not convert input to RDF dataset before normalization.","Could not
expand input before serialization to RDF.","Could not perform JSON-LD expansion.","Could not retrieve a JSON-LD document from the URL: https:\/\/fd
.winklerfamilie.eu\/static\/identity-v1.jsonld"]} - {"file":"JsonLD.php","line":111,"function":"normalize","uid":"f9e7c4","process_id":4145}
2021-07-14T12:34:35Z index [INFO]: JsonLD normalize error {"trace":"#0 \/var\/www\/friendica\/vendor\/friendica\/json-ld\/jsonld.php(159): JsonLdPr
ocessor->normalize(Object(stdClass), Array)\n#1 \/var\/www\/friendica\/src\/Util\/JsonLD.php(100): jsonld_normalize(Object(stdClass), Array)\n#2 \/
var\/www\/friendica\/src\/Util\/LDSignature.php(104): Friendica\\Util\\JsonLD::normalize(Array)\n#3 \/var\/www\/friendica\/src\/Util\/LDSignature.p
hp(78): Friendica\\Util\\LDSignature::hash(Array)\n#4 \/var\/www\/friendica\/src\/Protocol\/ActivityPub\/Transmitter.php(1163): Friendica\\Util\\LD
Signature::sign(Array, Array)\n#5 \/var\/www\/friendica\/src\/Module\/Objects.php(131): Friendica\\Protocol\\ActivityPub\\Transmitter::createActivi
tyFromItem(327476)\n#6 [internal function]: Friendica\\Module\\Objects::rawContent(Array)\n#7 \/var\/www\/friendica\/src\/App\/Module.php(332): cal
l_user_func(Array, Array)\n#8 \/var\/www\/friendica\/src\/App.php(562): Friendica\\App\\Module->run(Object(Friendica\\Core\\L10n), Object(Friendica
\\App\\BaseURL), Object(Friendica\\Util\\Logger\\StreamLogger), Object(Friendica\\Util\\Profiler), Array, Array)\n#9 \/var\/www\/friendica\/index.p
hp(42): Friendica\\App->runFrontend(Object(Friendica\\App\\Module), Object(Friendica\\App\\Router), Object(Friendica\\Core\\PConfig\\JitPConfig), O
bject(Friendica\\Security\\Authentication), Object(Friendica\\App\\Page), 1626266074.9257)\n#10 {main}"} - {"file":"JsonLD.php","line":112,"function":"normalize","uid":"f9e7c4","process_id":4145}
2021-07-14T12:34:35Z index [NOTICE]: no data for session {"session_id":"h5a65d70on08btpab8aoj01230","uri":"\/static\/activitystreams.jsonld"} - {"file":"Database.php","line":72,"function":"read","uid":"22627a","process_id":19976}
2021-07-14T12:34:35Z index [INFO]: No HTTP_SIGNATURE header [] - {"file":"HTTPSignature.php","line":476,"function":"getSigner","uid":"22627a","process_id":19976}

Do you get the "compacting error" all the time?

Yes this messages is all over the place.

https://github.com/friendica/friendica/issues/10254

This is exactly what I see. Thanks for the link.

Do I understand correctly, that this change is merged into dev but not available in 2021.07?

Access doesn't seam to be the problem:

root@serverpi:/var/www/friendica/static# ll -d
drwxr-xr-x 2 www-data www-data 4096 Jul  4 20:50 .
root@serverpi:/var/www/friendica/static# ll *v1*
-rw-r--r-- 1 www-data www-data 3622 Jul  4 20:50 identity-v1.jsonld
-rw-r--r-- 1 www-data www-data 2059 Jul  4 20:50 security-v1.jsonld

But I think I'll try to switch to dev using git clone anyway. Until now I used the zip files to upgrade.

Also I'm on Raspberry pi OS 32bit (raspi 4) if this information has anything to with it.

Ok. Got it. The static files could not be accessed with my old nginx config. It is the sample from github but don't ask me how old exactly.

This is the "old" rewrite to front controller (I had a quick look in the history: 3+ years ago) which rewrites access to the folder /static also to the front controller:

  # rewrite to front controller as default rule
  location / {
    if ($is_args != "") {
        rewrite ^/(.*) /index.php?pagename=$uri&$args last;
    }
    rewrite ^/(.*) /index.php?pagename=$uri last;
  }

  # rewrite to front controller as default rule
  location / {
    try_files $uri /index.php?pagename=$uri&$args;
  }

Yes it is fine. I used the latest one completely:

github.com/friendica/friendica…