Packaged layer is not valid

[ThKroschel]

Hi everyone,

after synchronising my project I got this message:
"Packaged layer is not valid. Error code invalid_dataprovider, error message:"

The layer is gone and the data (hundrets of features) is seemingly lost. Pushes from an other device were made and finished but the layer is not repaired.

Any ideas?

I had an 504 error some minutes before that happened.

Best regards!