addons-server: Check for updates fails on time-out

Describe the problem and steps to reproduce it:

(Please include as many details as possible.) Click “Check for updates” in the about:addons page.

What happened?

The check takes about 60 seconds and then it says no updates found. In the browser console when you enable requests logging I can see they all timed out:

20:49:27.326 1667245767325	addons.update-checker	WARN	Request for https://versioncheck.addons.mozilla.org/update/VersionCheck.php?reqVersion=2&id={16cbd87c-eb99-4f5c-9825-83cf13ab7ff8}&version=2.1&maxAppVersion=*&status=userEnabled&appID={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&appVersion=107.0&appOS=WINNT&appABI=x86_64-msvc&locale=en-US&currentAppVersion=107.0&updateType=97&compatMode=normal timed out
20:49:27.327 1667245767327	addons.update-checker	WARN	Request for https://versioncheck.addons.mozilla.org/update/VersionCheck.php?reqVersion=2&id=admin@fastaddons.com_Ctrl_GroupSpeedDial&version=2.6&maxAppVersion=*&status=userEnabled&appID={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&appVersion=107.0&appOS=WINNT&appABI=x86_64-msvc&locale=en-US&currentAppVersion=107.0&updateType=97&compatMode=normal timed out
20:49:27.328 1667245767328	addons.update-checker	WARN	Request for https://versioncheck.addons.mozilla.org/update/VersionCheck.php?reqVersion=2&id=steam-context-menu@skylark95.com&version=1.2.2&maxAppVersion=*&status=userDisabled&appID={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&appVersion=107.0&appOS=WINNT&appABI=x86_64-msvc&locale=en-US&currentAppVersion=107.0&updateType=97&compatMode=normal timed out
20:49:27.328 1667245767328	addons.update-checker	WARN	Request for https://versioncheck.addons.mozilla.org/update/VersionCheck.php?reqVersion=2&id={9ea6f004-dfa1-4d80-8cb0-b3f8bfe9004d}&version=1.1.0&maxAppVersion=*&status=userEnabled&appID={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&appVersion=107.0&appOS=WINNT&appABI=x86_64-msvc&locale=en-US&currentAppVersion=107.0&updateType=97&compatMode=normal timed out
20:49:27.328 1667245767328	addons.update-checker	WARN	Request for https://versioncheck.addons.mozilla.org/update/VersionCheck.php?reqVersion=2&id=admin@fastaddons.com_SendNoteToDevice&version=2.6&maxAppVersion=*&status=userEnabled&appID={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&appVersion=107.0&appOS=WINNT&appABI=x86_64-msvc&locale=en-US&currentAppVersion=107.0&updateType=97&compatMode=normal timed out
20:49:27.328 1667245767328	addons.update-checker	WARN	Request for https://versioncheck.addons.mozilla.org/update/VersionCheck.php?reqVersion=2&id=display-anchors@robwu.nl&version=1.3&maxAppVersion=*&status=userEnabled&appID={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&appVersion=107.0&appOS=WINNT&appABI=x86_64-msvc&locale=en-US&currentAppVersion=107.0&updateType=97&compatMode=normal timed out 

Or, I’ve just tried again and it failed with:

21:02:29.650 1667246549650	addons.update-checker	WARN	HTTP Request failed for an unknown reason
21:02:29.651 1667246549651	addons.update-checker	WARN	HTTP Request failed for an unknown reason 5
21:02:29.652 1667246549652	addons.update-checker	WARN	HTTP Request failed for an unknown reason 5
21:02:29.653 1667246549653	addons.update-checker	WARN	HTTP Request failed for an unknown reason 8
21:02:29.654 1667246549654	addons.update-checker	WARN	HTTP Request failed for an unknown reason 6
21:02:29.655 1667246549655	addons.update-checker	WARN	HTTP Request failed for an unknown reason 7
21:02:29.656 1667246549656	addons.update-checker	WARN	HTTP Request failed for an unknown reason 6
21:02:29.657 1667246549657	addons.update-checker	WARN	HTTP Request failed for an unknown reason 8
21:02:29.658 1667246549658	addons.update-checker	WARN	HTTP Request failed for an unknown reason 

What did you expect to happen?

Check for updates works on ESR and my release version. But it fails on my Developer Edition at work and also at home. For several days now.