Could not install plugin: No manifest for plugin ID ’undefined’

Thanks for this plugin !
But I can't install it via Options > Plugins. Get this error :
20210126_202809
And I can't find a jpl file in github.

Any idea what's going on ?
Thanks

In fact, I found out I can't install any plugins at all.
Trying to install also "Favorites plugin" and I get the same message.

Joplin (portable) 1.7.5 (prod, win32)

Client ID: 817c6c01ce9649c797b83efe3df5f1fe
Sync Version: 2
Profile Version: 34
Keychain Supported: No

Revision: 11b8821bf (master)