I cannot use "syms" on matlab online

Good morning, when I try to use the syms function it shows me this error:

Execution of script syms as a function is not supported:

/MATLAB Drive/syms.m

What can I do?

I checked a few related questions and a suggestion was to type:

restoredefaultpath

rehash toolboxcache

When I did it, matkab showed me this message: Unable to run the 'restoredefaultpath' function, because it is not supported for MATLAB Online. To use this function, use an installed version of MATLAB on your computer.

Is there anything I can do?

[DGM]

You have a script called syms.m. Don't name your variables or files in such a way that they shadow MATLAB function files. Rename that script.

[Giulia Di Giorgio]

THANK YOU!!