unexpected internal server error

Good day to everyone
When trying to change the properties the following message was received

UNEXPECTED INTERNAL SERVER ERROR
Unfortunately, an internal error has occurred on our servers.

You can try refreshing the page, and if the error persists, you can write us on the Forum.

Error detail:

500: get thing sketch: decode json {"board_fqbn":"arduino:samd:mkrwifi1010","board_name":"Arduino MKR WiFi 1010","board_type":"serial","created_at":"2019-05-09T15:12:50.65759Z","href":"/create/v2/files/d/47ba05e4a66135eedde807bb231e6a9f:Vleer/sketches_v2/__root/bootalarm_regularly","id":"0661efb2-f1af-44a8-bbc6-082b25a79ff6","libraries":[{"name":"Mouse","version":"1.0.1"}],"modified_at":"2019-11-23T13:54:26.286015Z","name":"bootalarm_regularly","path":"47ba05e4a66135eedde807bb231e6a9f:Vleer/sketches_v2/__root/bootalarm_regularly","secrets":{"SECRET_PASS":"xxx","SECRET_SSID":"xxx"},"size":7729,"thing_id":"3710c5cf-58ab-4c54-9ede-3ffcd73f29df","tutorials":null,"types":null,"user_id":"73338eb3-fce0-4a53-97e9-b848de6fa43e"} : json: cannot unmarshal object into Go struct field ArduinoCreateSketchv2.libraries of type string
CLOSE

It looked that the error was caused by my Thing. In order to go ahead, I deleted my Thing, and made a new one with the same name and sketch. Everything works ok now.
I hope it did not cause any trouble.
Thank you
Vleer