Whitelist and op on website

[Sakura307]

I'm the owner of a server. I was able to join yesterday with my friend, but when I tried to join today, it says I'm not whitelisted. I don't know how to op or whitelist myself on the website. I looked everywhere but can't find it. I want to be able to join without needing to restart the server and lose all my progress. I spent at least 5+ hours on the server and I got far. Is there a way to whitelist and op myself so I can join the server without losing my data? I only have the website to use, and I don't know how. The website looks like this, I've searched it up on the internet but it looks different. 

[NenadKingPRO]

From what I've read in your post, the only problem seems to be that you're not whitelisted and you don't have op on your own server. There is one solution that might work, first of all, you need to go to the "console" tab and write the command "whitelist on"(if it's not turned on already), always keep in mind that console commands already have the "/" in them so you should not write them, otherwise the command will not work. After that, write "whitelist add [your ign/username]", after that you should be added to the whitelist of the server and the console should give a response saying something like "[user] was added to the server's whitelist", another thing you could do to access the server is to turn the whitelist off by typing "whitelist off", to get op the only thing you need to do is to type "op [your ign/username]". This is the solution that i know and I think should work.

TL;DR -
Type these in the console
Solution 1 - Write "whitelist on" if it's not already on - "whitelist add [your ign/username]"
Solution 2 - Write "whitelist off"
Op problem solution - "op [your ign/username]"
make sure to not type "/" in the console