So I tried installing Hotjar but I guess I did something wrong as I am now getting a 500 internal server error.

Installed it in `website>go to website>customize>html>header-6` .

None
Traceback (most recent call last):
  File "/opt/odoo/odoo/tools/cache.py", line 84, in lookup
    r = d[key]
  File "/opt/odoo/odoo/tools/func.py", line 68, in wrapper
    return func(self, *args, **kwargs)
  File "/opt/odoo/odoo/tools/lru.py", line 44, in __getitem__
    a = self.d[obj].me
KeyError: ('ir.qweb', <function IrQWeb.compile at 0x7f5734b51d90>, 'website.layout', ('en_US', True, None, None, False, 1))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/odoo/odoo/tools/cache.py", line 84, in lookup
    r = d[key]
  File "/opt/odoo/odoo/tools/func.py", line 68, in wrapper
    return func(self, *args, **kwargs)
  File "/opt/odoo/odoo/tools/lru.py", line 44, in __getitem__
    a = self.d[obj].me
KeyError: ('ir.ui.view', <function View._read_template at 0x7f573514c950>, frozenset({1, 5, 6, 7, 11, 12, 13, 15, 16, 17, 18, 19, 26, 27, 28, 30, 31, 32, 34, 35, 36, 39, 40, 52, 53, 54, 55, 61, 63, 64}), 1088, ('en_US', True, None, None, False, 1))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/odoo/odoo/addons/base/ir/ir_qweb/qweb.py", line 369, in get_template
    document = options.get('load', self.load)(template, options)
  File "/opt/odoo/odoo/addons/base/ir/ir_qweb/ir_qweb.py", line 85, in load
    template = env['ir.ui.view'].read_template(name)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 1103, in read_template
    return self._read_template(self.get_view_id(xml_id))
  File "<decorator-gen-41>", line 2, in _read_template
  File "/opt/odoo/odoo/tools/cache.py", line 89, in lookup
    value = d[key] = self.method(*args, **kwargs)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 1094, in _read_template
    arch = self.browse(view_id).read_combined(['arch'])['arch']
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 727, in read_combined
    arch = self.apply_view_inheritance(arch_tree, root.id, self.model)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 677, in apply_view_inheritance
    source = self.apply_view_inheritance(source, view_id, model, root_id=root_id)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 676, in apply_view_inheritance
    source = self.apply_inheritance_specs(source, specs_tree, view_id)
  File "/opt/odoo/enterprise/web_studio/models/ir_ui_view.py", line 132, in apply_inheritance_specs
    return super(View, self).apply_inheritance_specs(source, specs_tree, inherit_id)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 654, in apply_inheritance_specs
    self.raise_view_error(_("Element '%s' cannot be located in parent view") % tag, inherit_id)
  File "/opt/odoo/odoo/addons/base/ir/ir_ui_view.py", line 516, in raise_view_error
    raise ValueError(message)
ValueError: Element '<script type="text/javascript" data-oe-id="1786" data-oe-xpath="/data/script" data-oe-model="ir.ui.view" data-oe-field="arch">' cannot be located in parent view

Error context:
View `Header Style 6`
[view_id: 1786, xml_id: customize_theme.template_header_style_6, model: n/a, parent_id: 1682]

load could not load template
Template: website.layout