fix: Try to fix 'Calling getCacheTree() of undefined' error

Signed-off-by: Marcel Klehr <mklehr@gmx.net>

Author: marcelklehr

src/lib/Account.ts

@@ -376,6 +376,7 @@ export default class Account {
         await this.init()
       }
     }
+    this.syncProcess = null
     this.localCachingResource = null
     await Logger.persist()
   }