First off, welcome to the InfinityFree forums, this issue could be formed by many reasons, one of which was mentioned above, please read it and see if it corresponds to your error.
If not, I’m sure if you provide a little more info, we will be able to support you.
Excellent! Then you can just read the replies already given and solve the problem yourself. After all, this question was solved already.
If you don t have the exact same problem and the solutions given are not sufficient for you, please create a new topic instead of hijacking someone else’s topic.