The Maestral client started receiving an error from the Dropbox API that seems to be incorrect (it's not using V1 of the API). This error pops up regularly and pauses the sync engine. When resumed, syncing works properly until it pauses again with the pop up error.
See https://github.com/samschott/maestral/issues/683 for all details and workarounds.
Please acknowledge and correct issue in Dropbox API so the client can continue working properly. Thank you!