API call: Invalid 'style': expected String, got nil

[eyalk11]

Describe the bug
A clear and concise description of what the bug is.
got
pynvim.api.common.NvimError: Vim:E5555: API call: Invalid 'style': expected String, got nil

when evaluate any cell

Desktop (please complete the following information):

• OS: [e.g. iOS] windows
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

python 3.9

BTW, how do I change python host? I mean I need pythno3_host to be 3.9 but still use another python in magma?

[rwijtvliet]

Same here, python 3.11 on MacOS

[nickhealy]

+1, on RHEL 7.5 (old I know, but I don't imagine this is OS related)
browser is chrome

[rolliver]

New here just installed and got the same error, tracked it down to outputbuffer.py 126

                    "style": None
                    if self.options.output_window_borders
                    else "minimal",
                    "border": "rounded"
                    if self.options.output_window_borders
                    else "none",

Seems to work if you change to "style": "minimal"

126c126
<                     "style": "minimal"
---
>                     "style": None