Error in 5.2.8 - Trying to access array offset on null PHP8.3.6

[C1977]

Hello, this morning we updated from 5.2.5 to newest 5.2.8. due to error:

"Creation of dynamic property Spipu\Html2Pdf\Html2Pdf::$_pdfa is deprecated" in /html2pdf-5.2.5/spipu/html2pdf/src/Html2Pdf.ph

after we upgraded PHP8.1.28 to PHP8.3. But now we get:
"Trying to access array offset on null" in /html2pdf-5.2.8/spipu/html2pdf/src/Parsing/Css.ph

Can you help?
PHP Version 8.3.6, Ubuntu 22.04.4 LTS

Thanks in advance
C.Funke

[C1977]

Look like in line 1251 in Css.php there are missing isset()
if ($this->value['border']['l']['width']) { [..] }
This problem does not exists in older versions.
I made a workaround adding 8 times issets

[W0rma]

I made a workaround adding 8 times issets

@C1977 What are the code places you had to adjust?

Do you plan to create a PR?