gnutls error on Emacs for Android armeabi 7a

[Lockywolf]

Hello, everyone.

I am using Emacs on an Onyx Boox Max 2, which has Android 6.
Installed from SourceForge.

Most things work as expected, but I cannot install anything from Melpa.
And I also cannot use
(url-retrieve-synchronously "https://stable.melpa.org/packages/";)

#+begin_src elisp
Debugger entered--Lisp error: (error "Invalid format character: ‘%t’")
  signal(error ("Invalid format character: ‘%t’"))
  error("Invalid format character: `%%%c'" 116)
  format-spec("gnutls-cli --x509cafile %t -p %p %h" ((116) (104 . 
"stable.melpa.org") (112 . "443")))
  open-tls-stream("stable.melpa.org" #<buffer  *url-http-temp*> 
"stable.melpa.org" 443)
  network-stream-open-tls("stable.melpa.org" #<buffer  *url-http-temp*> 
"stable.melpa.org" 443 (:type tls :nowait nil))
  open-network-stream("stable.melpa.org" #<buffer  *url-http-temp*> 
"stable.melpa.org" 443 :type tls :nowait nil)
  url-open-stream("stable.melpa.org" #<buffer  *url-http-temp*> 
"stable.melpa.org" 443 tls)
  url-http-find-free-connection("stable.melpa.org" 443 tls)
  url-http(#s(url :type "https" :user nil :password nil :host 
"stable.melpa.org" :portspec nil :filename "/packages/" :target nil :attributes 
nil :fullness t :silent nil :use-cookies t :asynchronous nil) 
#f(compiled-function (&rest args) #<bytecode -0x1c8f7ded>) (nil) nil tls)
  url-https(#s(url :type "https" :user nil :password nil :host 
"stable.melpa.org" :portspec nil :filename "/packages/" :target nil :attributes 
nil :fullness t :silent nil :use-cookies t :asynchronous nil) 
#f(compiled-function (&rest args) #<bytecode -0x1c8f7ded>) (nil))
  url-retrieve-internal("https://stable.melpa.org/packages/"; 
#f(compiled-function (&rest args) #<bytecode -0x1c8f7ded>) (nil) nil nil)
  url-retrieve("https://stable.melpa.org/packages/"; #f(compiled-function (&rest 
args) #<bytecode -0x1c8f7ded>) nil nil nil)
  url-retrieve-synchronously("https://stable.melpa.org/packages/";)
  (progn (url-retrieve-synchronously "https://stable.melpa.org/packages/";))
  eval((progn (url-retrieve-synchronously 
"https://stable.melpa.org/packages/";)) t)
  elisp--eval-last-sexp(nil)
  eval-last-sexp(nil)
  funcall-interactively(eval-last-sexp nil)
  call-interactively(eval-last-sexp nil nil)
  command-execute(eval-last-sexp)
#+end_src

Has anyone seen anything like that?
Any ideas how to fix this?

-- 
Your sincerely,
Vladimir Nikishkin (MiEr, lockywolf)
(Laptop)

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