With a previous beta version, I was using a local addons “Project” filepath to install 5.2 addons. But it doesn’t seem to be working on my re-install. But there is no feedback as to whether the Addon Manager is successfully reading the list of addons.
The “Where to Check” in the General tab of the 5.1 Preferences was similar. You only knew if it was touching the file when it listed addons to install. When Gramps was up-to-date with Addons, you couldn’t tell if it failed to poll or if everything was current.
In Addon manager complains about /addons/master/gramps52/listings/addons-en.txt , @avma was getting reports of 404 errors. Perhaps the Warnings feature of Gramps could report 404s if it isn’t finding the addons-en.txt
[ recte: addons-en.json
file which is the default and fallback for other language users ] file?
And another unanswered thread ( How should a gramplet validate a (local, network, internet) file path string? ) asks about the approved way to validate a path in Gramps.