missing form label in submit button

can anyone help me with the following matter. i am not familiar with coding so be gentle...
i want to validate a page through the wave (web accessibility evaluation tool) process for visually disabled users. therefore i need to have 0 errors counted by the platform. everytime i place the submit button within a form i get the error of missing label as shown in the attached picture.if it was another field i could probably bypass it but it's the submit button..the most important of all. can anyone help me fix this cause if not i cant use the form at all !

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