We made a call to them, and they told us that we cannot apply.
From Alberta Opportunity site:
At the time your application is postmarked and at the time the AINP assesses your application, you must have a valid work permit (not implied status or restoration status) for an eligible occupation. Valid work permits are based on one of the following:
- a positive Labour Market Impact Assessment (LMIA)
- a LMIA exemption for workers based on one of the following exemptions as determine by Immigration, Refugees and Citizenship Canada (IRCC):
- international trade agreements
- workers transferred within a company
- International Experience Canada
- Mobilité Francophone
- Post-Graduation Work Permit (PGWP) holder
Probably because an Open Work Permit does not fall in any of this categories we cannot apply. It means, if you have many years of work experience in any NOC on Open Work Permit, you cannot immigrate to Alberta. In other words, your work experience is nothing.