Same here. I got this error message:

An error has occurred somewhere in your code (in lists or HTML): An unhandled promise rejection occurred: Failed to execute 'get' on 'IDBObjectStore': The parameter is not a valid key. DataError: Failed to execute 'get' on 'IDBObjectStore': The parameter is not a valid key. DataError: Failed to execute 'get' on 'IDBObjectStore': The parameter is not a valid key. at eval (eval at PERCH.createPerchanceTree