Hi dear,
Correct, App Inventor projects use different component versions, so errors are likely to occur.
Usually, when moving from one builder to another, the best approach is to recreate the project.
Refer to this topic:
I can confirm the bug, because if we check the official documentation,
it states that if RedisServer is left as DEFAULT, the MIT server should be used, which currently does not happen.
Added to the Bugs Tracker