Upgrading from 1.12.1 to 2.0. Some small problems

[Njit]

First of all, kudos for the Phar installer. Way easier then uploading thousands of files.

My Website seems to work properly for most parts. Some errors:

- Unable to save templates

WARNING:
The {breadcrumbs} tag is removed from CMSMS Core
Instead, now use in your HTML template: {nav_breadcrumbs} !

I searched my template and tried to replace the tag. But i am unable to save the template. I get a blank screen with the http://<domainname>/admin/moduleinterface.php .

- MicroTiny internal links

I am unable to lookup internal links. I'm supposed to start typing to show a list of pages but nothing happens. So it's not Autocompleting

I see an error in my 'GRAND ALL' permissions. I had no problems with previous versions. Is there a way to fix this?

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Cms Version: 2.0
Installed Modules:
CMSMailer: 5.2.4
AdminSearch: 1.0
FileManager: 1.5
MenuManager: 1.50
MicroTiny: 2.0
ModuleManager: 2.0
News: 2.50
Search: 1.50
ThemeManager: 1.1.8
Gallery: 2.0.2
TinyMCE: 2.9.12
Gbook: 2.0.1
FormBuilder: 0.8.1.1
Captcha: 0.5.2
JQueryTools: 1.3.4
CGExtensions: 1.49.7
CGSimpleSmarty: 2.0.1
AceEditor: 1.0
Showtime: 3.4
Archiver: 0.2.6
CMSContentManager: 1.0
DesignManager: 1.0
Navigator: 1.0

Config Information:
php_memory_limit:
max_upload_size: 32000000
url_rewriting: mod_rewrite
page_extension: .html
query_var: page
auto_alias_content: true
locale:
set_names: true
timezone: Europe/Amsterdam
permissive_smarty: false

Php Information:
phpversion: 5.5.28
md5_function: Aan (Waar)
json_function: Aan (Waar)
gd_version: 2
tempnam_function: Aan (Waar)
magic_quotes_runtime: Uit (Onwaar)
E_STRICT: 0
E_DEPRECATED: 0
test_file_timedifference:
test_db_timedifference:
memory_limit: 128M
max_execution_time: Ongelimiteerd
output_buffering: Aan
file_uploads: Aan (Waar)
post_max_size: 48M
upload_max_filesize: 32M
session_save_path: /var/tmp (1733)
session_use_cookies: Aan (Waar)
xml_function: Aan (Waar)
xmlreader_class: Aan (Waar)

Performance Information:
allow_browser_cache: Uit (Onwaar)
browser_cache_expiry: 60
php_opcache: Uit (Onwaar)
smarty_cache: Uit (Onwaar)
smarty_compilecheck: Uit (Onwaar)
smarty_cache_udt: Uit (Onwaar)
auto_clear_cache_age: Uit (Onwaar)
Server Information:
Server Api: cgi-fcgi
Server Db Type: MySQL (mysqli)
Server Db Version: 5.5.44
Server Db Grants: Kan geen geldige "GRAND ALL" permissie vinden. Dit kan problemen opleveren bij het installeren of verwijderen van modules. Of zelfs bij het toevoegen of verwijderen van items, zoals pagina's.
Server Time Diff: Geen tijdverschil aangetroffen

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[calguy1000]

For a blank screen check your error logs.

It may help to actually paste the template here, then maybe we can reproduce the issue and explain it.