Re: Unable to Submit Application on Apple Job Portal/Careers
Wondering if you are using Safari or another browser like Chrome etc.
The web-page in your screenshot seems to be a third-party (non-Apple) website.
(ie: has a blue [in] logo ... maybe the "Linked In" website ?)
The website may work best in the browser that the particular website developer suggests for use.
For Linked In: https://www.linkedin.com/help/linkedin/answer/a515767?hcppcid=search
Eg: says: You need an up-to date browser version / Safari or Firefox amongst others
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Am no expert in this area:
If the job you want is there: You could try going back to Apple's own "Careers" website: Careers at Apple to apply
You can scroll to: "Areas of work at Apple": https://www.apple.com/careers/work-at-apple.html
You need to log-in with your Apple Account.
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Else: There's another discussion thread on a similar issue, and with replies that may (or may not) be helpful:
See: I am trying to submit an application for … - Apple Community