HTML template not working anymore

[StvGdsn]

After upgrading from version 0.0.11 on netbox v3.7.5 to 0.0.16 on V4.2.3 my HTML label design stopped working

I configured in V0.0.11 this code and was working well:

'device': {
    'title': 'Wifi label',
    'with_qr': False,
    'url_template': '{{ obj.cf.default_qr_code }}',
    'text_align_horizontal': 'center',
    'text_align_vertical': 'middle',
    'text_template':   

'<style>.columns { display: flex; justify-content: space-between; align-items: center; } .column { padding: 0 2mm; } .column.column-2 { flex: 2; text-align: right; padding-right: 2mm; } .column.column-3 { text-align: left; padding-left: 2mm; flex: 2; } .column.column-4 { flex: 1; text-align: center; } .logo { display: inline-block; height: 18mm; width: 20mm; } .qr-code { display: inline-block; height: 16mm; width: 16mm; } .row p { margin-bottom: 0.5mm; } .row { margin-bottom: 0.5mm; } .column p { margin: 0; padding: 0; font-size: 14px; }</style>'

'<p style="font-size: 18px; margin-bottom: 0.5mm; text-align: center;">To configure this device, surf to http://some link here</p><br>'

'<div class="row"><div class="columns" style="display: flex; justify-content: space-between; margin-bottom: 1mm;">'
'<div class="column" style="text-align: center;"><div class="logo"><img src="/static/icon.png" height="100%" width="100%"></div></div>'
'<div class="column column-2"><p><strong>Router login:</strong></p><p><strong>Default wifi:</strong></p><p><strong>Password:</strong></p></div>'
'<div class="column column-3"><p>user</p><p>{{ obj.cf.default_wifi }}</p><p>{{ obj.cf.default_password }}</p></div>'
'<div class="column column-4"><div class="qr-code"><img src="data:image/png;base64,{{qrCode}}" height="100%" width="100%"/></div></div>'
'</div></div><br>'

'<p style="font-size: 14px; margin-top: 0.5mm; text-align: center; line-height: 1.2;"><strong>Need assistance?</strong>  some text here</p>'
,
                   
    'label_width': '105mm',
    'label_height': '43mm',
    'label_edge_top': '0mm',
    'label_edge_left': '0mm',
    'label_edge_right': '0mm',`

after the upgrade to 0.0.16 and NB V4.2.3 i only get 505 and 504 errors,
if i delete all this and use the default it works exept the 'url_template': '{{ obj.cf.default_qr_code }}',

does anyone have any ideas?

i tried downgrading to 0.0.11 but that doesnt work either