In case nothing seems to work, you can't access a space or the app is not showing you updated information, it might be that something really drastic is needed.
Here are 3 things you can try:
try to restart the app
try logging in and out again of the app
delete the app and reinstall the app
Hopefully, these mitigations may resolve the issue.
If you need help with this, check out these links:
How to delete apps on your iPhone, iPad, and iPod touch: https://support.apple.com/en-us/HT207618
If an app won’t respond or seems frozen, you can close it, then open it again: https://support.apple.com/en-us/HT201330
Delete or disable apps on Android
Fix an installed Android app that isn't working
PS: Sometimes the issue might be that you have actively turned off bluetooth or put your phone in flight mode - it happens 🤷♀️
If you use android, you also need to have your "Background services" turned on. You will find this setting under "Permissions" in the app.
The solution is to enable it and trying again! 😉