OpenWebIf, backing up of LCD4Linux settings not working

[Orlandox]

Hello, with version 5.4 I can not back up anymore LCD4Linux settings on OpenWebIf. Nothing happens when I press green arrow.LCD4Linux back-up.PNG

[alphacabbage1]

can not back up anymore LCD4Linux settings on OpenWebIf. Nothing happens when I press green arrow.

I'm seeing the same on a Vu+Duo2 with 5.4.002. The browser Console shows:

POST http://192.168.1.202/lcd4linux/config [HTTP/1.1 500 Internal Server Error 38ms]

Version HTTP/1.1
Transferred 311 B (95 B size)

    Charset
    	UTF-8
    Content-Disposition
    	attachment;filename=lcd4config
    Content-Length
    	95
    Content-Type
    	text/html
    Date
    	Wed, 11 Nov 2020 15:11:07 GMT
    Server
    	TwistedWeb/19.7.0
    	
    Accept
    	text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
    Accept-Encoding
    	gzip, deflate
    Accept-Language
    	en-US,en;q=0.5
    Connection
    	keep-alive
    Content-Length
    	460
    Content-Type
    	multipart/form-data; boundary=---------------------------2111854591471001668151393658
    Cookie
    	TWISTED_SESSION=8d9512d67c6048c7e7b5c6bf7132b5250452e259a30eade989ab81319d078416
    Host
    	192.168.1.202
    Origin
    	http://192.168.1.202
    Referer
    	http://192.168.1.202/lcd4linux/config
    Upgrade-Insecure-Requests
    	1
    User-Agent
    	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:82.0) Gecko/20100101 Firefox/82.0

[alphacabbage1]

500 Internal Server Error

Debug log extract...

<   749.3809> 14:17:36.2943 [eEPGCache] event cb18 not found in epgcache
<   778.8272> 14:18:05.7406 
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/twisted/web/http.py", line 1746, in dataReceived
    
  File "/usr/lib/python2.7/site-packages/twisted/web/http.py", line 2162, in _finishRequestBody
    
  File "/usr/lib/python2.7/site-packages/twisted/web/http.py", line 2237, in allContentReceived
    
  File "/usr/lib/python2.7/site-packages/twisted/web/http.py", line 937, in requestReceived
    
--- <exception caught here> ---
  File "/usr/lib/python2.7/site-packages/twisted/web/server.py", line 217, in process
    
  File "/usr/lib/python2.7/site-packages/twisted/web/server.py", line 284, in render
    
  File "/usr/lib/python2.7/site-packages/twisted/web/resource.py", line 265, in render
    
  File "/usr/lib/enigma2/python/Plugins/Extensions/LCD4linux/WebConfigSite.py", line 140, in render_POST
    return self.action(request)
  File "/usr/lib/enigma2/python/Plugins/Extensions/LCD4linux/WebConfigSite.py", line 236, in action
    req.setHeader('Content-Length', os.stat(lcd4config).st_size)
  File "/usr/lib/python2.7/site-packages/twisted/web/http.py", line 1305, in setHeader
    
  File "/usr/lib/python2.7/site-packages/twisted/web/http_headers.py", line 220, in setRawHeaders
    
  File "/usr/lib/python2.7/site-packages/twisted/web/http_headers.py", line 40, in _sanitizeLinearWhitespace
    
exceptions.AttributeError: 'long' object has no attribute 'splitlines'

<   796.2055> 14:18:23.1189 [Task] job Components.Task.Job name=SoftcamCheck #tasks=1 completed with [] in None