LaTeX errors when creating PDF version.
This typically indicates Rd problems.
LaTeX errors found:
! Undefined control sequence.
<argument>  Y = X B + V, \quad \operatorname 
                                             {vec}B = R\gamma , 
l.591 }{}
         
! Undefined control sequence.
<argument> ...\hat {V}-1 \otimes x']\operatorname 
                                                  {vec}Y, \quad \tilde {\Sig...
l.601 }{}
         
! Undefined control sequence.
<argument>  \operatorname 
                          {var}y^f = \tilde {V} + (x' \otimes I_m)R W^{-1}R'...
l.606 }{}
         
! LaTeX Error: Environment aligned undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Misplaced alignment tab character &.
<argument>  \begin {aligned} &
                              \text {MAE} = \frac {1}{n}\sum _{i=1}^{n}|e_i|...
l.1646 }{}
          
! Undefined control sequence.
<argument>  \begin {aligned} &\text 
                                    {MAE} = \frac {1}{n}\sum _{i=1}^{n}|e_i|...
l.1646 }{}
          
! Misplaced alignment tab character &.
<argument> ... \frac {1}{n}\sum _{i=1}^{n}|e_i|, &
                                                  &\text {MAPE} = \frac {1}{...
l.1646 }{}
          
! Misplaced alignment tab character &.
<argument> ...\frac {1}{n}\sum _{i=1}^{n}|e_i|, &&
                                                  \text {MAPE} = \frac {1}{n...
l.1646 }{}
          
! Undefined control sequence.
<argument> ...{1}{n}\sum _{i=1}^{n}|e_i|, &&\text 
                                                  {MAPE} = \frac {1}{n}\sum ...
l.1646 }{}
          
! Misplaced alignment tab character &.
<recently read> &
                 
l.1646 }{}
          
! Undefined control sequence.
<argument> ...i}{y_i}\right |\times 100 \\ &\text 
                                                  {RMSE} = \sqrt {\frac {1}{...
l.1646 }{}
          
! Misplaced alignment tab character &.
<argument> ...sum _{i=1}^{n}(e_i)^2},\quad \quad &
                                                  &\text {RMSPE} = \sqrt {\f...
l.1646 }{}
          
! Misplaced alignment tab character &.
<argument> ...um _{i=1}^{n}(e_i)^2},\quad \quad &&
                                                  \text {RMSPE} = \sqrt {\fr...
l.1646 }{}
          
! Undefined control sequence.
<argument> ...=1}^{n}(e_i)^2},\quad \quad &&\text 
                                                  {RMSPE} = \sqrt {\frac {1}...
l.1646 }{}
          
! LaTeX Error: \begin{list} on input line 1635 ended by \end{aligned}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
! Undefined control sequence.
<argument>  \text 
                  {Brier} = \frac {\sum (y_i-\hat {p}_i)^2}{n}, 
l.1657 }{}
          
! Undefined control sequence.
<recently read> \operatorname 
                              
l.1669 ...ce \eqn{\operatorname{var}(\hat{y}_i)}{}
                                                  , this metric can be expre...
! Undefined control sequence.
<argument>  \text 
                  {CRPS}=\sum _{i=1}^{n} \sigma \left (\frac {1}{\sqrt {\pi ...
l.1673 }{}
          
! Undefined control sequence.
<argument> ..._i-\hat {y}_i)/\sqrt {\operatorname 
                                                  {var}(\hat {y}_i)}
l.1675 .../\sqrt{\operatorname{var}(\hat{y}_i)}}{}
                                                  , and \eqn{\Phi}{} and \eq...