Hello!

As you may have noticed, it's not only the footsteps that are rails - but all the blocks look like vanilla textures. This means your resource pack failed to load.
There could be several reasons for this, so here are a few things you can try:

After relogging, use the command "/rp h -force", twice if one try doesn't work.

If that has no effect, try "/rp d -force" and then back to "rp h -force".

If that doesn't work either, make sure you have server resource packs enabled in your configuration of the server (go to your server list on Minecraft, add MCME, click edit, and then you will see the option to enable server resource packs) - since it worked for you earlier I think this is probably not the issue.

If none of that works, there might in fact be an issue with the server at the moment (I heard something about global-chat acting up a few hours ago, not sure if it was fixed already). If that's the case the only thing you can do is wait until it's fixed. You can always download the resource packs manually here: Official Resourcepacks.

Let us know if the problem persists.

Glad that got resolved for you! Just be aware that travelling through the world some textures will change per area, because of the different roads enjoy mcme!