Column values cannot be used as values in table or graph

Hello all,

I'm very new to Power BI, I opened it for the first time yesterday, but I have some background with SQL queries. I'm trying to accomplish smething very simple, a graph that shows "Power on time" vs "Tests execution time".

My data comes from a MySQL table, with two tables (simplified from real tables) :

power_on : timestamp, power_on_time, test_bench_id

test_execution : timestamp, test_execution_time, test_id, test_bench_id

Since there can be multiple tests performed on the same day, I created an intermediate table, that sums the execution_time from different tests happening on the same day. Since there can be multiple entries in the power_on table for the same day, I also created an intermediate table that sums the power_on_time for each different day. At the end I have the two intermediate tables : 

power_on_grouped : date, power_on_time, test_bench_id

test_execution_grouped : date, test_execution_time, test_bench_id

I merge these two tables ino one with a multi-column join to finally have the following table :

power_on_vs_test_execution : date, power_on_time, test_execution_time, test_bench_id

And when I try to make a table or a graph chart using that last table, I'm unable to select power_on_time and execution_time as values.

I'm using Power BI Desktop 2.132.1053.0 64-bit. I've searched a bit and found some stuff about "Discourage implicit measures" and Tabular Editor, but being on a PC without admin privilege, I can't install that software. Is there any way around that ?

I've tried deleting all the measures in my model without success.

The request to create power_on_grouped :

let
    Source = power_on,
    #"Colonnes supprimées" = Table.RemoveColumns(Source,{"STATION_NUM"}),
    #"Date extraite" = Table.TransformColumns(#"Colonnes supprimées",{{"TIMESTAMP", DateTime.Date, type date}}),
    #"Lignes groupées" = Table.Group(#"Date extraite", {"station_feature.STATION_ID", "TIMESTAMP"}, {{"Uptime", each List.Sum([OI_UPTIME]), type number}}),
    #"Colonnes renommées" = Table.RenameColumns(#"Lignes groupées",{{"station_feature.STATION_ID", "test_bench_id"}, {"TIMESTAMP", "date"}, {"Uptime", "power_on_time"}})
in
    #"Colonnes renommées"

 test_execution_grouped

let
    Source = test_execution,
    #"Lignes groupées" = Table.Group(Source, {"station_feature.STATION_ID", "TIMESTAMP"}, {{"Execution time by ODTGen", each List.Sum([EXECUTION_TIME]), type nullable number}, {"Timestamp.1", each _, type table [TIMESTAMP=datetime, ID=text, STATION_NUM=nullable text, SOFTVER_ODTGEN=nullable text, HARDVER_ODTGEN=nullable text, NEXT_CAL_DATE=nullable date, UUT_NAME=nullable text, UUT_SERIAL_NUMBER=nullable text, UUT_VERSION=nullable text, USER_LOGIN_NAME=nullable text, USER_LOGIN_LOGIN=text, START_DATE_TIME=nullable datetime, EXECUTION_TIME=nullable number, UUT_STATUS=nullable text, UUT_ERROR_CODE=nullable number, UUT_ERROR_MESSAGE=nullable text, PAT_NAME=text, PAT_VERSION=text, TEST_LEVEL=nullable text, INTERFACE_ID=number, EXECUTION_MODE=nullable text, LOOP_MODE=nullable text, STOP_ON_FAIL=number, EXECUTION_GLOBAL_INFOS=nullable text, EXECUTION_COMMENT=nullable text, VOLTAGE_CHOICE=nullable number, VOLTAGE_MIN=nullable number, VOLTAGE_NOM=nullable number, VOLTAGE_MAX=nullable number, station_feature.STATION_ID=nullable text, station_feature.SITE=nullable text, Duration=duration]}}),
    #"Date extraite" = Table.TransformColumns(#"Lignes groupées",{{"TIMESTAMP", DateTime.Date, type date}}),
    #"Colonnes supprimées" = Table.RemoveColumns(#"Date extraite",{"Timestamp.1"}),
    #"Lignes groupées1" = Table.Group(#"Colonnes supprimées", {"station_feature.STATION_ID", "TIMESTAMP"}, {{"Execution time by day", each List.Sum([Execution time by ODTGen]), type nullable number}}),
    #"Colonnes renommées" = Table.RenameColumns(#"Lignes groupées1",{{"station_feature.STATION_ID", "test_bench_id"}, {"TIMESTAMP", "date"}, {"Execution time by day", "test_execution_time"}})
in
    #"Colonnes renommées"

And the final table : 

let
    Source = power_on_grouped,
    #"Requêtes fusionnées" = Table.NestedJoin(Source, {"date", "test_bench_id"}, test_execution_grouped, {"date", "test_bench_id"}, "test_execution_time", JoinKind.Inner),
    #"test_execution_time développé" = Table.ExpandTableColumn(#"Requêtes fusionnées", "test_execution_time", {"test_execution_time"}, {"test_execution_time"})
in
    #"test_execution_time développé"

The table I obtain in the table view (opposed to report view) shows that I have all the data that I want, but I just can't put it on a report, that's very frustrating !

Thanks for the help !