If you have a member with issues logging into the Member Portal, then check these few things first with the member. If they are still having problems, hit us up on the Control Panel chat.
Verify they are using the correct log in URL.
Make sure they are using https://[your gym name].members.pushpress.com and not https://[your gym name].pushpress.com which is for coaches and admins only.
Verify they are not in Private Browsing mode on their browser
Private Browsing mode will not store login information, as thats kinda the point. The result will be they will log in, but every page they try to go to they will be kicked back to logged out. They will not be able to go through with reserving a spot in class if this is the case.
Verify they have a password setup
In the Control Panel go to the members detail page, click on Edit Personal Info button in right column, double check to make sure they have a password setup on that page.