Due to recent events, we found out that major problems can happen when trying to change settings, due to one small section- your website.
Even though it seems like a small, useless box, it is vital to have it either filled up, or cleared out.
If you are trying to change your profile settings, and keep getting "Website is Invalid" and have no idea why, it's because your website box is partially filled.
In order for there not to be complications, you need to have it either filled, or cleared.
To change it, go into settings, scroll down until you find the box that says "Website", check to see if there is a valid website, or if it's blank, if it's half-completed, make it blank, save your changes.