"MM 13 1" cannot log in. The solution is that it cannot log in. Could be a problem.
1, network problem
Check the network, switch between WIFI and mobile network, and check whether other software works normally.
2. Software version problem
3, mobile phone permissions
Give the phone permission when checking, such as photo storage and network settings.
Step 4 clean up the cache
Check whether it is the reason of insufficient memory in the mobile phone,