Hi @atefeh amirpour ,
Welcome to the community!
Check for three things!
1. Make sure the Internet connection is stable!
2. Clear your Trello apps cache!
3. Make sure not to run multiple software at a time! Some times CPU can't take a load of multiple software at the same time and it shows the blank screen of the app/software!
Hello friends! From the community that brought you Welcome Wednesday, Throwback Thursday and Friday Fun, welcome to Taco Tuesday, a weekly discussion about all things Trello. The best part? One Tac...
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