The port looks fine. Charges and quick charges.
Thank you for your asking. Kindly try some stay-at-home troubleshooting tips below:
1. Does the error message appear when you dock in the cable? When will the message appear?
2. Please try to enter "Safe Mode". If the function works well in Safe Mode yet the issue remains out of Safe Mode, please check on any disturbance from the installed 3rd party apps.
# How to enter and exit "Safe Mode"
3. Also, please try "the Factory Reset"
Settings>System>Reset options>Erase all data(factory reset)
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.
If the issue remains the same after performing the Factory Reset, please put the device with the dehumidifier for a day. You may also try to clean the port with compressed air can.
Ignore the previous automated comment.
Upgrade to the latest firmware.
Take a hair blower and direct it towards the charging port for few seconds.
Try using a different charger.
Use the secondary charging port on the right side of the phone by removing the rubber guard.
See if you are still having the same issue.