I also have the same error. i have reached a monthly limit of submission so i decided to delete some old data, but I still can’t submit any data.
Welcome to the community, @gnazare! Kindly please be informed that reaching the storage threshold has no connection with submitting your data to the server (at the moment). The 404 error refers to your app was able to communicate with a given server, but the server could not find what was requested. You may need to check out your server to see if the form/project is still deployed on the server. Please also note that the exact project should be there on the server that you have on the app when submitting the submissions to the server. Otherwise, you may not be able to submit the data.
