Error 10903 on Save Editor

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1

Hi, Error 10903 , when I try to save the site in the editor.
What should be done?
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Thanks

2

I had exactly the same problem and tried everything to resolve it. Browsers, cache, even a new pc! Eventually I found it was caused by grouping two fields together. I deleted them both, recreated them, grouped them and the site was saving again!

3

It happens to me instead with the javascript code, if I write a line and try to save, it gives code 10903